Maybe it's time to figure out some other geometric shapes that don't cause so much angst to either the readers or the characters. I mean, my friend Jen from The Starry Eyed Revue makes a great point about love triangles: they put too much power into the hands of one character. And often, that character abuses that power by a) toying with the emotions of the other two or b) bouncing from one person to another or c) just being annoying by complaining about how hard it is to have two people in love with you. How confusing.
In the Vampire Academy books, this looked like a love triangle, with Rose in love with Dimitri and Adrian in love with Rose. Then something terrible happens to Dimitri and it looks like Rose might be with Adrian. But wait ... a fourth character is lurking in the sidelines. Nicely played, Richelle Mead!You can see that this one has more of a potential for trouble as most of the power flows to and from Rose.